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Monday, April 20, 2009
White House Dinner
Three White House chefs can prepare sixty-person dinner in six hours. Two of the chefs caught a virus and had to stay at home. Will the remaining chef be able to prepare tonight's dinner for one hundred and twenty people all by himself?
3 comments:
Assuming that they all work at the same speed then it would take 12 hours for 1 person to prepare dinner for 120. I sure would not want to prepare dinner for 120 by myself in 12 hours, but I guess it could be done. Here is how I came to this answer. In order to see what the workload for one person was I divided everything by 3. 3 people/3 = 1 person, 60 dinners/3 people = 20 dinners per chef, and 6 hours/3 people = 2 hours each. So one chef can prepare 20 dinners in 2 hours. 20/120= 6 and then times that by 2 hours = 12 hours. I sure hope I got that right. Let me know if I made a mistake on it.
Oops, I think I did make a mistake. I should not have divided the 6 hours by 3 because it takes 1 person 6 hours to prepare 20 meals (unless they do 2 hour shifts with the given info of 3 people, 60 meals, in 6 hours). So it would take 1 chef 36 hours to prepare dinner for 120 people. 20/120 = 6. 6 X 6 hours = 36 hours which is not possible.
She did it again!
Bravo, Amy, for the correct answer and great explanation.
New tricky puzzle is coming at midnight.
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